Improvement in combination-locks



H. GOODRICH. COMBINATION-LOCKS.

N o 195,815 Patented 001:. 2, 18 77.

S E S N H W ATTORNEYS MPETERS. PHOTD-LITHOGRAPHER. WASHINGTON. D C.

UNIT D "STATES PATENT QFFICE.

HANSON GOODRIOH, OF MCLEANSBOROUGH, ILLINOIS.

IMPROVEMENT IN COMBINATION-LOCKS.

Specification forming part of Letters Patent No. 195,815, dated October2, 1877; application filed July 7, 1877.

To all whom it may concern:

Be it known that I, HANSON GOODRICH, of McLeansborough, in the county ofHamilton and State of Illinois, have invented a new and valuableImprovement in Combination-Lock Latches; and I do hereby declare thatthe following is a full, clear, and exact description of theconstruction and operation of the same, reference being had to theannexed drawings, making a part of this specification, and to theletters and figures of reference marked thereon.

Figure l ofthe drawings is a representation of a plan view of mycombination-lock latch. Fig. 2 is a transverse vertical sectional View;and Figs. 3, 4, 5, 6, 7, 8, and 9 are details of the same.

The nature of my invention relates to oer-- tain improvements upon thereversible combination-lock for which Letters Patent No. 188,890 weregranted to myself and P. J. Chapman, March 27, 1877, as will behereinafter more fully set forth.

The annexed drawing, to which reference is made, fully illustrates myinvention.

A represents the lock-case fastened to the door A, and provided withdetachable plate B at the end. D is the bolt, with spring G. O is thecam or block, with handle 0 at the inner end of the bolt. F is thelocking-cam at the top of the case, with spring E between it and thebolt. H is the knob-spindle, with a knob, I, at each end.

Next to the inner part of the lock-case is placed an interiorly-gearedrim, J, within which is placed acogged segment, J. This segment has ahub, to, projecting through that side of the case, and around said hubis formed an annular groove, 1), which fits over and around a circularflange, d, formed on the inside of the lock-case, as shown in Fig. 2.

In the edge of the rim J is a notch, e, having one side, 0, madeinclined, as seen in Fig. 1.

In addition to this compound wheel, as constructed, I use a series ofalternate single wheels, K and compound wheels L, placed around the hubf, projecting inward from the outer plate of the lock-case, andconstructed in precisely the same manner as described in the patentabove referred to.

Between the various wheels are placed antifriction rings M M,providedwith suitable ears, and placed on studs h h in the lock-case.

The peculiar construction of the compound wheel J J, with the hub,groove, and flange as described, prevents anybody from picking the lookfrom the outside by the insertion of any instrument.

The operation of the lock is precisely the same as in the patentreferred to, the bolt D dropping down so that the rib i in its underside will drop into the notches on the wheels when said wheels areturned so that the various notches will coincide, and then the bolt isoperated, like the latch-bolt of an ordinary door-lock, by turningeither one of the doorknobs.

In addition to the devices above described, I use in my present lock aseries of wire springs, S, one for each wheel in the combination. Eachspring S is made of a single piece of wire coiled around one of thestuds or posts h, one end being bent as shown in Fig. 7 to form thebrake m. The other end of the wire extends downward for a certaindistance, and then coiled to form a spring, n. From this coil the wireextends upward, and forms a hook, p, which is engaged in a notch, s, inthe inner end of the bolt D. In this end of the bolt is a series ofnotches, s, as shown in Fig. 9, corresponding with the number of springsused.

When the bolt is raised and locked the ends 1) of the springs S aredrawn upward, which causes the ends m to lie against the periphery ofthe wheels and act as brakes thereon. When the bolt is unlocked thesebrakes are relieved from the wheels.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a combination-lock, substantially as herein described, thecompound wheel consisting of the internally-geared rim J, having outsidenotch c, with incline c, and the cogged segment J, formed with theprojecting hub a, with groove b surrounding the same, in

combination with the circular flange d on the In testimony that I claimthe above I have lock-case, as and for the purposes herein set hereuntosubscribed my name in the presence forth. of two witnesses.

2. One or more springs, S, coiled around the stu'l h, and forming brakesm, coils n, and. HANSON GOODRICH. hooks p, in combination with bolt D,having notches sin its inner end, and the series of Witnesses:

wheels of the lock, substantially as and for JAMES T. WALKER, thepurposes herein set forth. J. E. WILLIAMSON.

